2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
6 * ================================================================================
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 * ============LICENSE_END=========================================================
20 package org.onap.aai.util;
25 public abstract class FileWatcher extends TimerTask {
26 private long timeStamp;
30 * Instantiates a new file watcher.
32 * @param file the file
34 public FileWatcher( File file ) {
36 this.timeStamp = file.lastModified();
41 * @see java.util.TimerTask.run
43 public final void run() {
44 long timeStamp = file.lastModified();
46 if( (timeStamp - this.timeStamp) > 500 ) {
47 this.timeStamp = timeStamp;
55 * @param file the file
57 protected abstract void onChange( File file );